init.vim

filetype plugin indent on
syntax on
set t_Co=256

set encoding=UTF-8

set clipboard=unnamedplus
set completeopt=noinsert,menuone,noselect
set hidden
set cursorline
set inccommand=split
set number
set splitbelow splitright
set title
set ttimeoutlen=0
set wildmenu
set signcolumn=yes
set updatetime=100
set splitright
set splitbelow

set tabstop=4
set shiftwidth=4
set expandtab
set background=light
set mouse=a

" File browser
let g:netrw_banner=0
let g:netrw_liststyle=0
let g:netrw_browse_split=4
let g:netrw_altv=1
let g:netrw_winsize=25
let g:netrw_keepdir=0
let g:netrw_localcopydircmd='cp -r'

autocmd VimEnter * NERDTree
autocmd BufWinEnter * NERDTreeMirror
autocmd VimEnter * wincmd l
autocmd BufWinEnter * wincmd l

call plug#begin()
Plug 'dracula/vim'
Plug 'sonph/onehalf', {'rtp': 'vim'}
Plug 'ryanoasis/vim-devicons'
Plug 'scrooloose/nerdtree'
Plug 'preservim/nerdcommenter'
Plug 'neoclide/coc.nvim', {'branch': 'release'}
Plug 'airblade/vim-gitgutter'
Plug 'itchyny/lightline.vim'
Plug 'junegunn/fzf', { 'do': { -> fzf#install() } }
Plug 'junegunn/fzf.vim'
call plug#end()

let g:lightline= {
    \ 'colorscheme': 'one',
    \ 'active': {
    \   'left': [ [ 'mode', 'paste' ],
    \             [ 'readonly', 'filename', 'modified', 'coc_error', 'coc_warning', 'coc_hint', 'coc_info' ] ],
    \   'right': [ [ 'lineinfo',  ],
    \              [ 'percent' ],
    \              [ 'fileformat', 'fileencoding', 'filetype'] ]
    \ },
    \ 'component_expand': {
    \   'coc_error'        : 'LightlineCocErrors',
    \   'coc_warning'      : 'LightlineCocWarnings',
    \   'coc_info'         : 'LightlineCocInfos',
    \   'coc_hint'         : 'LightlineCocHints',
    \   'coc_fix'          : 'LightlineCocFixes',
    \ },
\ }

let g:lightline.component_type = {
    \ 'coc_error'        : 'error',
    \ 'coc_warning'      : 'warning',
    \ 'coc_info'         : 'tabsel',
    \ 'coc_hint'         : 'middle',
    \ 'coc_fix'          : 'middle',
\ }   

function! s:lightline_coc_diagnostic(kind, sign) abort
  let info = get(b:, 'coc_diagnostic_info', 0)
  if empty(info) || get(info, a:kind, 0) == 0
    return ''
  endif
  return printf('%s %d', a:sign, info[a:kind])
endfunction
function! LightlineCocErrors() abort
  return s:lightline_coc_diagnostic('error', 'E')
endfunction
function! LightlineCocWarnings() abort
  return s:lightline_coc_diagnostic('warning', 'W')
endfunction
function! LightlineCocInfos() abort
  return s:lightline_coc_diagnostic('information', 'I')
endfunction
function! LightlineCocHints() abort
  return s:lightline_coc_diagnostic('hints', 'H')
endfunction

autocmd User CocDiagnosticChange call lightline#update()

" Use autocmd to force lightline update.
autocmd User CocStatusChange,CocDiagnosticChange call lightline#update()

let g:NERDTreeShowHidden=1

let g:NERDCreateDefaultMappings = 1
let g:NERDSpaceDelims=1
let g:NERDCommentEmptyLines = 1


colorscheme onehalflight

set nobackup
set nowritebackup

" Use <c-space> to trigger completion.
if has('nvim')
  inoremap <silent><expr> <c-space> coc#refresh()
else
  inoremap <silent><expr> <c-@> coc#refresh()
endif

" Make <CR> auto-select the first completion item and notify coc.nvim to
" format on enter, <cr> could be remapped by other vim plugin
" inoremap <silent><expr> <cr> pumvisible() ? coc#_select_confirm()
"                               \: "\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"

" Use `[g` and `]g` to navigate diagnostics
" Use `:CocDiagnostics` to get all diagnostics of current buffer in location list.
nmap <silent> [g <Plug>(coc-diagnostic-prev)
nmap <silent> ]g <Plug>(coc-diagnostic-next)

" GoTo code navigation.
nmap <silent> gd <Plug>(coc-definition)
nmap <silent> gy <Plug>(coc-type-definition)
nmap <silent> gi <Plug>(coc-implementation)
nmap <silent> gr <Plug>(coc-references)

" Use K to show documentation in preview window.
nnoremap <silent> K :call <SID>show_documentation()<CR>

function! s:show_documentation()
  if (index(['vim','help'], &filetype) >= 0)
    execute 'h '.expand('<cword>')
  elseif (coc#rpc#ready())
    call CocActionAsync('doHover')
  else
    execute '!' . &keywordprg . " " . expand('<cword>')
  endif
endfunction

" Highlight the symbol and its references when holding the cursor.
autocmd CursorHold * silent call CocActionAsync('highlight')

" Symbol renaming.
nmap <leader>rn <Plug>(coc-rename)

" Formatting selected code.
xmap <leader>f  <Plug>(coc-format-selected)
nmap <leader>f  <Plug>(coc-format-selected)

augroup mygroup
  autocmd!
  " Setup formatexpr specified filetype(s).
  autocmd FileType typescript,json setl formatexpr=CocAction('formatSelected')
  " Update signature help on jump placeholder.
  autocmd User CocJumpPlaceholder call CocActionAsync('showSignatureHelp')
augroup end

" Applying codeAction to the selected region.
" Example: `<leader>aap` for current paragraph
xmap <leader>a  <Plug>(coc-codeaction-selected)
nmap <leader>a  <Plug>(coc-codeaction-selected)

" Remap keys for applying codeAction to the current buffer.
nmap <leader>ac  <Plug>(coc-codeaction)
" Apply AutoFix to problem on the current line.
nmap <leader>qf  <Plug>(coc-fix-current)

" Run the Code Lens action on the current line.
nmap <leader>cl  <Plug>(coc-codelens-action)

" Map function and class text objects
" NOTE: Requires 'textDocument.documentSymbol' support from the language server.
xmap if <Plug>(coc-funcobj-i)
omap if <Plug>(coc-funcobj-i)
xmap af <Plug>(coc-funcobj-a)
omap af <Plug>(coc-funcobj-a)
xmap ic <Plug>(coc-classobj-i)
omap ic <Plug>(coc-classobj-i)
xmap ac <Plug>(coc-classobj-a)
omap ac <Plug>(coc-classobj-a)

" Remap <C-f> and <C-b> for scroll float windows/popups.
if has('nvim-0.4.0') || has('patch-8.2.0750')
  nnoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? coc#float#scroll(1) : "\<C-f>"
  nnoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? coc#float#scroll(0) : "\<C-b>"
  inoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? "\<c-r>=coc#float#scroll(1)\<cr>" : "\<Right>"
  inoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? "\<c-r>=coc#float#scroll(0)\<cr>" : "\<Left>"
  vnoremap <silent><nowait><expr> <C-f> coc#float#has_scroll() ? coc#float#scroll(1) : "\<C-f>"
  vnoremap <silent><nowait><expr> <C-b> coc#float#has_scroll() ? coc#float#scroll(0) : "\<C-b>"
endif

" Use CTRL-S for selections ranges.
" Requires 'textDocument/selectionRange' support of language server.
nmap <silent> <C-s> <Plug>(coc-range-select)
xmap <silent> <C-s> <Plug>(coc-range-select)

" Add `:Format` command to format current buffer.
command! -nargs=0 Format :call CocAction('format')

" Add `:Fold` command to fold current buffer.
command! -nargs=? Fold :call     CocAction('fold', <f-args>)

" Add `:OR` command for organize imports of the current buffer.
command! -nargs=0 OR   :call     CocActionAsync('runCommand', 'editor.action.organizeImport')

" Mappings for CoCList
" Show all diagnostics.
nnoremap <silent><nowait> <space>a  :<C-u>CocList diagnostics<cr>
" Manage extensions.
nnoremap <silent><nowait> <space>e  :<C-u>CocList extensions<cr>
" Show commands.
nnoremap <silent><nowait> <space>c  :<C-u>CocList commands<cr>
" Find symbol of current document.
nnoremap <silent><nowait> <space>o  :<C-u>CocList outline<cr>
" Search workspace symbols.
nnoremap <silent><nowait> <space>s  :<C-u>CocList -I symbols<cr>
" Do default action for next item.
nnoremap <silent><nowait> <space>j  :<C-u>CocNext<CR>
" Do default action for previous item.
nnoremap <silent><nowait> <space>k  :<C-u>CocPrev<CR>
" Resume latest coc list.
nnoremap <silent><nowait> <space>p  :<C-u>CocListResume<CR>